Merge remote branch 'origin/master' into fedora/master
[glibc.git] / bits / sched.h
blobaf92dbca35a07f75949884b3dffd81b2fd9f2e18
1 /* Definitions of constants and data structure for POSIX 1003.1b-1993
2 scheduling interface.
3 Copyright (C) 1996, 1997, 2001, 2003, 2007 Free Software Foundation, Inc.
4 This file is part of the GNU C Library.
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Lesser General Public
8 License as published by the Free Software Foundation; either
9 version 2.1 of the License, or (at your option) any later version.
11 The GNU C Library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library; if not, write to the Free
18 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
19 02111-1307 USA. */
21 #ifndef _SCHED_H
22 # error "Never include <bits/sched.h> directly; use <sched.h> instead."
23 #endif
26 /* Scheduling algorithms. */
27 #define SCHED_OTHER 0
28 #define SCHED_FIFO 1
29 #define SCHED_RR 2
31 /* Data structure to describe a process' schedulability. */
32 struct sched_param
34 int __sched_priority;
38 #if defined _SCHED_H && !defined __cpu_set_t_defined
39 # define __cpu_set_t_defined
40 /* Size definition for CPU sets. */
41 # define __CPU_SETSIZE 1024
42 # define __NCPUBITS (8 * sizeof (__cpu_mask))
44 /* Type for array elements in 'cpu_set'. */
45 typedef unsigned long int __cpu_mask;
47 /* Basic access functions. */
48 # define __CPUELT(cpu) ((cpu) / __NCPUBITS)
49 # define __CPUMASK(cpu) ((__cpu_mask) 1 << ((cpu) % __NCPUBITS))
51 /* Data structure to describe CPU mask. */
52 typedef struct
54 __cpu_mask __bits[__CPU_SETSIZE / __NCPUBITS];
55 } cpu_set_t;
57 /* Access functions for CPU masks. */
58 # define __CPU_ZERO(cpusetp) \
59 do { \
60 unsigned int __i; \
61 cpu_set *__arr = (cpusetp); \
62 for (__i = 0; __i < sizeof (cpu_set) / sizeof (__cpu_mask); ++__i) \
63 __arr->__bits[__i] = 0; \
64 } while (0)
65 # define __CPU_SET(cpu, cpusetp) \
66 ((cpusetp)->__bits[__CPUELT (cpu)] |= __CPUMASK (cpu))
67 # define __CPU_CLR(cpu, cpusetp) \
68 ((cpusetp)->__bits[__CPUELT (cpu)] &= ~__CPUMASK (cpu))
69 # define __CPU_ISSET(cpu, cpusetp) \
70 (((cpusetp)->__bits[__CPUELT (cpu)] & __CPUMASK (cpu)) != 0)
72 __BEGIN_DECLS
74 extern int __sched_cpucount (size_t __setsize, const cpu_set_t *__setp)
75 __THROW;
77 __END_DECLS
79 # define __CPU_COUNT(cpusetp) \
80 __sched_cpucount (sizeof (cpu_set_t), cpusetp)
81 #endif